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