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)(18,23)(19,25)(20,27)(21,29)(24,31)(26,30)(1,3,5,11)(2,6,7,15)(4,13,14,10)(8,16,12,9)(17,18,22,19)(20,24,27,26)(21,25,29,23)(28,31,32,30)(17,19,22,18)(20,26,27,24)(21,23,29,25)(28,30,32,31)(2,7)(6,15)(8,12)(9,16)(17,20)(18,24)(19,26)(21,28)(22,27)(23,30)(25,31)(29,32) involution — undirected(20,27)(24,26)(28,32)(30,31) 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.