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