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