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