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