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