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