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