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