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