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