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