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