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