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