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