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