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