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