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