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