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