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