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