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