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