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