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