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