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