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