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