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