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