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