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)(21,35)(22,37)(23,28)(24,30)(27,36)(29,40)(31,42)(32,39)(33,46)(34,47)(38,44)(41,45)(43,48)(1,3,4,8)(2,5,6,7)(9,11)(10,14)(12,15)(13,16)(17,19,22,30,23,31,36,21)(18,24,27,26,28,35,37,42)(20,29,34,44,32,43,45,33)(25,38,41,40,39,46,47,48)(2,6)(3,8)(9,12,13,10)(11,15,16,14)(17,20,23,32)(18,25,28,39)(19,29,31,43)(21,33,30,44)(22,34,36,45)(24,38,35,46)(26,40,42,48)(27,41,37,47)(2,6)(5,7)(11,16)(14,15)(20,32)(25,39)(29,43)(33,44)(34,45)(38,46)(40,48)(41,47) involution — undirected(2,6)(5,7)(17,21,36,31,23,30,22,19)(18,26,37,24,28,42,27,35)(20,33,45,43,32,44,34,29)(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.