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