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