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