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