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