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