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