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