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