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