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