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)(17,18,23,28)(19,24,32,40)(20,33,35,25)(21,26,22,27)(29,37,31,39)(30,44,46,38)(34,42,36,41)(43,48,45,47)(1,3)(2,6)(4,7)(5,8)(17,19,23,32)(18,24,28,40)(20,30,35,46)(21,31,22,29)(25,38,33,44)(26,39,27,37)(34,43,36,45)(41,47,42,48)(9,11,12,16)(10,13,14,15)(19,29)(21,22)(24,37)(26,27)(30,43)(31,32)(34,36)(38,47)(39,40)(41,42)(44,48)(45,46)(2,7)(3,8)(10,14)(13,15)(17,20)(18,25)(19,30)(21,36)(22,34)(23,35)(24,38)(26,42)(27,41)(28,33)(29,43)(31,45)(32,46)(37,47)(39,48)(40,44) involution — undirected(1,4,5,6)(2,3,7,8)(17,21,23,22)(18,26,28,27)(19,31,32,29)(20,34,35,36)(24,39,40,37)(25,41,33,42)(30,43,46,45)(38,47,44,48)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.