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)(11,15,16,13)(17,18)(19,22)(20,26)(21,27)(23,25)(24,30)(28,31)(29,32)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,18)(19,22)(20,28)(21,25)(23,27)(24,29)(26,31)(30,32) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(11,16)(17,19,22,18)(20,24,30,26)(21,25,23,27)(28,31,32,29)(10,14)(13,15)(17,20)(18,24)(19,26)(21,29)(22,30)(23,31)(25,32)(27,28) involution — undirected(2,5)(6,8)(10,14)(13,15)(17,21,22,23)(18,25,19,27)(20,29,30,31)(24,32,26,28)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.