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