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