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