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)(17,18,22,25)(19,24,26,23)(20,29,30,21)(27,28,32,31)(33,34)(35,41)(36,38)(37,40)(39,43)(42,47)(44,45)(46,48)(2,8)(3,4)(10,15)(11,12)(19,26)(23,24)(27,32)(28,31)(34,36)(39,41)(40,44)(46,47) involution — undirected(1,3,7,4)(2,9,8,5)(6,11,14,12)(10,16,15,13)(17,19)(18,23)(20,27)(21,28)(22,26)(24,25)(29,31)(30,32)(33,35)(34,39)(36,41)(37,42)(38,43)(40,46)(44,47)(45,48)(1,4,7,3)(2,5,8,9)(6,12,14,11)(10,13,15,16)(17,19)(18,24)(20,27)(21,31)(22,26)(23,25)(28,29)(30,32)(33,36,38,34)(35,41,43,39)(37,40,45,44)(42,46,48,47)(1,5)(2,3)(4,8)(6,13)(7,9)(10,11)(12,15)(14,16)(17,20)(18,21)(19,27)(22,30)(23,28)(24,31)(25,29)(26,32)(33,35)(34,39)(36,41)(37,42)(38,43)(40,46)(44,47)(45,48) involution — undirected(1,6,7,14)(2,10,8,15)(3,11,4,12)(5,13,9,16)(17,21)(18,20)(19,28)(22,29)(23,27)(24,32)(25,30)(26,31)(33,37,38,45)(34,40,36,44)(35,42,43,48)(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.