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