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