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