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