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