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