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