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