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