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