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