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