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