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