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