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