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