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