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)(18,22,24,27)(19,25,26,28)(1,3)(2,6,8,15)(4,11)(5,10)(7,13,9,14)(12,16)(17,18,20,27,21,24,29,22)(19,23,28,32,26,31,25,30)(2,7)(4,12)(6,13)(8,9)(11,16)(14,15)(17,19)(18,23)(20,28)(21,26)(22,30)(24,31)(25,29)(27,32) involution — undirected(18,24)(22,27)(23,31)(30,32) 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.