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