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