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