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