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