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