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