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