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