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)(20,23)(21,29)(22,24)(26,30)(27,31)(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)(17,19,22,20)(18,23,24,25)(21,27,30,28)(26,31,29,32)(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)(21,30)(23,25)(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)(17,20,22,19)(18,25,24,23)(21,28,30,27)(26,32,29,31)(33,36,39,40)(34,35,41,37)(38,44,47,48)(42,43,46,45)(1,3,5,9)(2,6,8,10)(4,11,12,15)(7,13,14,16)(17,18)(19,25)(20,23)(21,26)(22,24)(27,32)(28,31)(29,30)(33,37,39,35)(34,36,41,40)(38,45,47,43)(42,44,46,48)(1,4)(2,7)(3,11)(5,12)(6,13)(8,14)(9,15)(10,16)(17,21,22,30)(18,26,24,29)(19,27,20,28)(23,31,25,32)(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.