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