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