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