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