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