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