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