One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,12)(5,8)(7,13)(9,11)(10,15)(14,16)(17,18,21,24)(19,25,27,22)(20,23,28,30)(26,31,32,29)(33,34)(35,43)(36,42)(37,41)(38,39)(40,44)(45,47)(46,48)(1,2)(3,9)(4,12)(5,8)(6,11)(7,13)(10,14)(15,16)(20,28)(23,30)(26,32)(29,31)(34,39)(35,44)(41,42)(45,46) involution — undirected(1,2,5,8)(3,9,11,6)(4,7,13,12)(10,15,16,14)(17,19,21,27)(18,22,24,25)(20,26,28,32)(23,29,30,31)(33,35)(34,40)(36,45)(37,46)(38,44)(39,43)(41,47)(42,48)(1,2)(3,6)(4,7)(5,8)(9,11)(10,14)(12,13)(15,16)(33,36,38,37)(34,41,39,42)(35,45,44,46)(40,47,43,48)(1,3)(2,6)(4,10)(5,11)(7,14)(8,9)(12,15)(13,16)(17,20)(18,23)(19,26)(21,28)(22,29)(24,30)(25,31)(27,32)(33,34)(35,40)(36,41)(37,42)(38,39)(43,44)(45,47)(46,48) involution — undirected(1,4)(2,7)(3,10)(5,13)(6,14)(8,12)(9,15)(11,16)(17,18)(19,22)(20,23)(21,24)(25,27)(26,29)(28,30)(31,32)(33,37,38,36)(34,42,39,41)(35,46,44,45)(40,48,43,47)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.