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