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