One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,4,7,6)(9,10)(11,15)(12,13)(14,16)(17,18,22,26)(19,27,28,23)(20,24,30,29)(21,31,32,25)(1,3)(2,6)(4,8)(5,7)(10,13)(14,15)(19,28)(20,30)(23,27)(24,29) involution — undirected(1,4)(2,7)(3,8)(5,6)(9,10)(11,14)(12,13)(15,16)(17,19,22,28)(18,23,26,27)(20,31,30,25)(21,29,32,24)(1,2,5,8)(3,4,7,6)(9,11)(10,14)(12,16)(13,15)(17,19)(18,23)(20,25)(21,29)(22,28)(24,32)(26,27)(30,31)(1,3)(2,4)(5,7)(6,8)(17,20,22,30)(18,24,26,29)(19,25,28,31)(21,23,32,27)(1,4)(2,7)(3,8)(5,6)(17,21,22,32)(18,25,26,31)(19,29,28,24)(20,27,30,23)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.