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