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)(17,18,22,27,23,20,29,26)(19,24,21,25,30,28,32,31)(1,3)(2,6)(4,11)(5,10)(7,9)(8,13)(12,16)(14,15)(17,19)(18,24)(20,28)(21,22)(23,30)(25,27)(26,31)(29,32) involution — undirected(3,10)(6,9)(11,16)(13,15)(17,20)(18,23)(19,28)(21,31)(22,26)(24,30)(25,32)(27,29) involution — undirected(2,7)(6,9)(8,14)(13,15)(17,21)(18,25)(19,29)(20,31)(22,30)(23,32)(24,26)(27,28) involution — undirected(1,4,5,12)(2,8,7,14)(3,11,10,16)(6,13,9,15)(19,30)(21,32)(24,28)(25,31)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.