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