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