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