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