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