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