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