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