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