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