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