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