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