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