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