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