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)(17,18,22,23)(19,24,20,27)(21,29,31,25)(26,32,28,30)(2,6)(7,8)(9,11)(10,13)(12,15)(14,16)(17,19)(18,24)(20,22)(21,30)(23,27)(25,28)(26,29)(31,32) involution — undirected(1,3,5,4)(2,7,6,8)(10,14)(11,15)(17,20,22,19)(18,24,23,27)(21,28,31,26)(25,30,29,32)(1,4,5,3)(2,8,6,7)(10,14)(13,16)(17,21,23,29,22,31,18,25)(19,26,24,30,20,28,27,32)(2,6)(7,8)(17,18,22,23)(19,24,20,27)(21,29,31,25)(26,32,28,30)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.