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