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