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