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)(11,13)(12,15)(14,16)(17,18)(19,26)(20,23)(21,29)(22,24)(25,30)(27,31)(28,32)(33,34,39,41)(35,40,44,37)(36,47,46,42)(38,48,45,43)(2,7)(3,10)(4,12)(13,14)(17,19,22,20)(18,23,24,26)(21,27,30,28)(25,31,29,32)(33,35,39,44)(34,40,41,37)(36,38,46,45)(42,43,47,48)(18,24)(23,26)(25,29)(31,32)(34,41)(35,44)(36,46)(43,48) involution — undirected(1,3,6,10)(2,8,7,5)(4,11,12,16)(9,13,15,14)(17,18)(19,26)(20,23)(21,25)(22,24)(27,32)(28,31)(29,30)(33,36,39,46)(34,42,41,47)(35,45,44,38)(37,43,40,48)(1,4,6,12)(2,9,7,15)(3,11,10,16)(5,14,8,13)(17,20,22,19)(18,23,24,26)(21,27,30,28)(25,32,29,31)(33,37)(34,35)(36,43)(38,47)(39,40)(41,44)(42,45)(46,48)(1,5,6,8)(2,10,7,3)(4,13,12,14)(9,11,15,16)(17,21)(18,25)(19,27)(20,28)(22,30)(23,31)(24,29)(26,32)(33,38,39,45)(34,43,41,48)(35,46,44,36)(37,42,40,47)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.