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