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