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