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