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