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