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