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