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