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