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