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