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