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