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