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