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