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