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