One vertex per element, one color per generator, with an edge from x to x·s.
(4,12)(8,13)(10,16)(14,15)(17,18)(19,25)(20,24)(21,22)(23,27)(26,31)(28,29)(30,32)(33,34,38,39)(35,43,46,40)(36,37,42,41)(44,47,48,45)(1,2)(3,9)(4,8)(5,6)(7,11)(10,15)(12,13)(14,16)(18,22)(23,25)(24,29)(30,31)(34,39)(36,42)(40,43)(44,48) involution — undirected(2,6)(7,9)(8,13)(14,15)(17,18)(19,23)(20,24)(21,22)(25,27)(26,30)(28,29)(31,32)(33,35,38,46)(34,40,39,43)(36,44,42,48)(37,45,41,47)(1,2)(3,7)(4,8)(5,6)(9,11)(10,14)(12,13)(15,16)(17,19,21,27)(18,23,22,25)(20,26,28,32)(24,30,29,31)(33,36,38,42)(34,41,39,37)(35,44,46,48)(40,47,43,45)(1,3,5,11)(2,7,6,9)(4,10,12,16)(8,14,13,15)(1,4)(2,8)(3,10)(5,12)(6,13)(7,14)(9,15)(11,16)(17,20,21,28)(18,24,22,29)(19,26,27,32)(23,30,25,31)(33,37,38,41)(34,42,39,36)(35,45,46,47)(40,48,43,44)A 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.