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