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