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