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