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