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