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