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