One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,8)(6,9)(7,11)(10,12)(13,14)(15,16)(18,23)(20,27)(25,29)(28,32)(33,34,38,41)(35,42,45,39)(36,37,40,46)(43,48,47,44)(3,7)(4,11)(10,15)(12,16)(17,18)(19,20)(21,25)(22,23)(24,27)(26,28)(29,30)(31,32)(33,34,38,41)(35,39,45,42)(36,37,40,46)(43,44,47,48)(1,3,6,7)(2,4,9,11)(5,10,14,15)(8,12,13,16)(17,19,22,24)(18,20,23,27)(21,26,30,31)(25,28,29,32)(33,35)(34,39)(36,43)(37,44)(38,45)(40,47)(41,42)(46,48)(1,2)(3,4)(5,13)(6,9)(7,11)(8,14)(10,16)(12,15)(17,18)(19,20)(21,29)(22,23)(24,27)(25,30)(26,32)(28,31)(33,36)(34,37)(35,43)(38,40)(39,44)(41,46)(42,48)(45,47) involution — undirected(1,4)(2,7)(3,9)(5,12)(6,11)(8,15)(10,13)(14,16)(17,20)(18,24)(19,23)(21,28)(22,27)(25,31)(26,29)(30,32)(33,37)(34,40)(35,44)(36,41)(38,46)(39,47)(42,43)(45,48) involution — undirected(1,5)(2,8)(3,10)(4,12)(6,14)(7,15)(9,13)(11,16)(17,21,22,30)(18,25,23,29)(19,26,24,31)(20,28,27,32)(33,35)(34,39)(36,43)(37,44)(38,45)(40,47)(41,42)(46,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.