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