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