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