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