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