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