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