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