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